arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.03000math.NAcs.NA
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基于轮廓的非线性特征值求解的迭代法

An Iterative Method for Contour-Based Nonlinear Eigensolvers

Julien Brenneck, Eric Polizzi

摘要:

轮廓积分技术已成为求解线性和非线性本征值问题的一种常用方法。主要包括Sakurai-Sugiura方法、Beyn算法、FEAST/NLFEAST算法和其他有理滤波技术。虽然这些方法可以导致有效的“黑箱”方法来解决线性特征值问题,但它们仍然存在一些缺点,用于解决非线性本征值问题,这在数学上和实际上都更具挑战性。在本文中,我们介绍了一种新的混合算法,有利地结合了迭代性质的NLFEAST的有效性的Beyn的方法来处理一般的非线性。在这样做时,这种NLFEAST-Beyn混合算法可以克服目前的局限性,这两种算法分别采取。在介绍了它的推导从Beyn的和NLFEAST的角度来看,几个数值例子进行了讨论,以证明新技术的效率。

英文摘要:

Contour integration techniques have become a popular choice for solving the linear and non-linear eigenvalue problems. They principally include the Sakurai-Sugiura methods, the Beyn's algorithm, the FEAST/NLFEAST algorithms and other rational filtering techniques. While these methods can result in effective 'black-box' approach for solving linear eigenvalue problems, they still present several shortcomings for addressing nonlinear eigenvalue problems which are both mathematically and practically far more challenging. In this paper, we introduce a new hybrid algorithm that advantageously combines the iterative nature of NLFEAST with the effectiveness of Beyn's approach to deal with general non-linearity. In doing so, this NLFEAST-Beyn hybrid algorithm can overcome current limitations of both algorithms taken separately. After presenting its derivation from both a Beyn's and NLFEAST's perspective, several numerical examples are discussed to demonstrate the efficiency of the new technique.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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